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为探讨成岩作用与储层物性演化特征之间的成因联系,查明不同成岩相物性差异的成因及其形成过程,对华池地区长8储层各成岩相的孔隙度演化进行了定量模拟,分析了其孔隙度演化路径的差异.本区绿泥石膜胶结成岩相、不稳定组分溶蚀成岩相、压实充填成岩相与碳酸盐致密胶结成岩相压实损失孔隙度分别为17.6%、20.5%、25.8%和11.4%,早期胶结损失孔隙度为4.5%、4.9%、5.6%和24.9%,溶蚀增加孔隙度为1.4%、2.3%、0.2%和0,晚期胶结损失孔隙度为7.8%、9.7%、3.2%和0.沉积物初始组构差异造成的各成岩相初始孔隙度差别是微小的,但其在很大程度上控制了成岩作用的类型和强度,从而造成了不同成岩相经历了不同的成岩变化过程和孔隙度演化路径,形成了现今组构面貌和孔隙度的差异.
In order to explore the genetic relationship between diagenesis and reservoir physical property evolution, identify the causes and formation process of physical differences of diagenetic facies, and quantitatively simulate the porosity evolution of each diagenetic facies of Chang 8 reservoir in Huachi area, The differences of porosity evolution path are analyzed.The chlorite-facies diagenetic facies, unstable component diagenetic facies, compaction-filled diagenetic facies and carbonate tight diagenetic facies compaction loss porosity are 17.6% , 20.5%, 25.8% and 11.4% respectively. The porosity of the early cementation loss was 4.5%, 4.9%, 5.6% and 24.9%, and the porosity increased 1.4%, 2.3%, 0.2% 7.8%, 9.7%, 3.2% and 0. The difference in initial porosity of diagenetic facies caused by the difference in initial structure of sediments is slight, but it largely controls the type and intensity of diagenesis, resulting in different Diagenetic facies underwent different diagenetic processes and evolutionary pathways of porosity, forming the difference between the microstructure and porosity of today.